JP6886766B2 - Wood member joint structure and joint reinforcement - Google Patents

Description

The present invention relates to a wood member joining structure in which a fiber sheet is attached to both of the wood members to be joined and reinforced by the fiber sheet, and a joint reinforcing material for reinforcing the joint portion of the wood member by using the fiber sheet. Is.

Hardware for joining is widely used at the joints of columns and beams that form the structural frame of wooden buildings. However, bolts, screws, and the like are used to attach the hardware, and the wooden members of the columns and beams have cross-sectional defects. In addition, stress concentration may occur around the bolt hole for inserting the bolt and around the position where the screw or the like is screwed, and the structural member may be damaged.
On the other hand, in the case of earthquake-resistant repair of existing wooden buildings or repair of wooden buildings in which joints of wooden members are damaged due to an earthquake or the like, it may not be possible to newly attach hardware to reinforce them.

Under such circumstances, a method of reinforcing a fiber sheet in which high-tensile fibers such as aramid fibers are woven into a sheet by attaching it to a joint portion of a wooden member has been proposed, for example, in Patent Document 1.
In this technique, a fiber sheet is woven into a sheet and impregnated with a synthetic resin, and the fiber sheet is attached to both of the wooden members to be joined by the adhesive force of the synthetic resin. The fiber sheet attached in this way can resist the force in the direction of pulling the joined wooden members apart.

Japanese Unexamined Patent Publication No. 2001-279814

However, the above-mentioned prior art has problems that are desired to be solved as described below.
In the event of an earthquake, a large force in the direction of repeated inversion acts on the structural frame of a wooden building, and the fiber sheet attached to the surface at the joint of columns and beams has a force in the tensile direction and a force in the compression direction. Will act alternately. When a compressive force acts on the joints of the wood members, the wood is deformed, and the fiber sheet impregnated with the synthetic resin is also deformed accordingly. The fiber sheet obtained by curing the impregnated synthetic resin has rigidity against bending, and when the fiber sheet is deformed so as to bulge in the direction perpendicular to the surface of the fiber sheet, the fiber sheet attached to the wooden member is peeled off. Force may act. When a part of the adhesive surface between the wood member and the fiber sheet is peeled off by such a force, the force for joining the two is reduced.

Further, the fiber sheet may be deformed in the out-of-plane direction when a compressive force is applied, or the resin sheet impregnated and cured may be cracked due to the shearing force in the in-plane direction of the fiber sheet. When the impregnated synthetic resin cracks, the fibers are greatly deformed at that portion, which becomes a weak point of the fiber sheet and may break from this portion.
The peeling and cracking of the fiber sheet is not limited to the time of an earthquake, but also when a force in the compression direction acts on the fiber sheet, or when a tensile force that cannot follow the elongation of the impregnated synthetic resin acts. May occur.

The present invention has been made in view of the above circumstances, and an object of the present invention is to prevent cracking or peeling of a fiber sheet impregnated with a synthetic resin and attached to a wooden member, and to reduce the strength of a joint. It is an object of the present invention to provide a wood member joint structure that suppresses the above-mentioned conditions, and to provide a joint portion reinforcing material that can be used in this wood member joint structure.

In order to solve the above problems, the invention according to claim 1 is a wood member joining structure in which an end surface of a first wood member is abutted against a second wood member and joined, and a plurality of wood members are continuously formed in the axial direction. A strip-shaped fiber sheet containing the above fibers is attached over the surfaces of both wood members to be joined, and the strip-shaped fiber sheet is impregnated with a synthetic resin and adhered to the first wood member or the second wood member. It has a resin-impregnated portion and a non-impregnated portion in which the fibers are deformably exposed and are not adhered to the first wooden member and the second wooden member, and the non-impregnated portion is the non-impregnated portion. Provided is a wood member joining structure provided between a portion of the resin impregnated portion bonded to the first wood member and a portion bonded to the second wood member.

In the wood member joining structure of the present invention, the strip-shaped fiber sheet attached over the two wood members to be joined suppresses the relative displacement in which both wood members are separated in the direction of the fiber, and reinforces the joint portion. Can be done. Further, since the non-impregnated portion is provided between the portion of the resin impregnated portion adhered to the first wooden member and the portion adhered to the second wooden member, the direction of pressing the resin impregnated portion against each other is provided. When a relative displacement or a relative displacement in the direction along the joint surface occurs, the non-impregnated portion is deformed, and the generation of force in the direction of peeling the strip-shaped fiber sheet can be suppressed. Further, it is possible to suppress the occurrence of cracks in the synthetic resin impregnated in the strip-shaped fiber sheet due to the deformation of the non-impregnated portion, and to prevent the occurrence of weak points.

The invention according to claim 2 is a wood member joining structure in which an end surface of a first wood member is abutted against a second wood member to be joined, and a strip-shaped fiber sheet containing a plurality of fibers continuous in the axial direction is formed. The strip-shaped fiber sheet is attached over the surfaces of both wooden members to be joined, and the strip-shaped fiber sheet is impregnated with a synthetic resin and adhered to the first wooden member or the second wooden member, and the resin impregnated portion. The first wooden member and the said first wooden member are impregnated with a synthetic resin having a smaller elastic coefficient than the synthetic resin impregnated in the portion, or coated with a synthetic resin having a smaller elastic coefficient than the synthetic resin impregnated in the resin impregnated portion. It has a flexible portion that is not adhered to the second wooden member, and the flexible portion is adhered to the portion of the resin impregnated portion that is adhered to the first wooden member and the second wooden member. It provides a wood member joining structure provided between the formed portions.

In the wood member joining structure of the present invention, as in the invention of claim 1, both wood members are pulled apart in the direction of the fiber by the strip-shaped fiber sheet attached over the two wood members to be joined. Displacement can be suppressed and the joint can be reinforced. In addition, the flexible portion is flexibly deformed to suppress the generation of a force in the direction of peeling the strip-shaped fiber sheet, and the first wooden member and the second wooden member are relatively displaced. Occasionally, it is possible to suppress cracking of the impregnated resin and prevent the occurrence of weak points.

The invention according to claim 3 is the position of the contact surface where the end face of the first wood member is abutted against the second wood member in the wood member joining structure according to claim 1 or 2. It is assumed that the non-impregnated portion or the flexible portion is provided on both sides.

In this wooden member joining structure, the end face of the column is brought into contact with the upper surface or the lower surface of the horizontal member such as a beam or a base to be joined, and the end face of the horizontal member such as a beam / displacement is brought into contact with the side surface of the column. In the part to be joined, etc., it resists the force that both sides try to separate, and even if the relative displacement of both occurs due to the deformation of the non-impregnated part or the flexible part, the attached strip-shaped fiber sheet is peeled off. It is possible to suppress and suppress the occurrence of weak points due to cracking of the impregnated synthetic resin.

The invention according to claim 4 has the wood member joining structure according to claim 1 or 2, wherein the end face of the first wood member has an axis in a direction substantially perpendicular to the axis of the first wood member. The strip-shaped fiber sheet is abutted against and joined to the surface of the second wooden member, and the strip-shaped fiber sheet includes one having an axis in an axial direction and an inclined direction of the first wooden member and the second wooden member. The strip-shaped fiber sheet has the first wooden member and the second wooden member between the portion of the resin impregnated portion bonded to the first wooden member and the portion bonded to the second wooden member. It has a part that is stretched apart from the wooden member,
It is assumed that the stretched portion is the non-impregnated portion or the flexible portion.

In this wooden member joining structure, the end face of the column is brought into contact with the upper surface or the lower surface of the horizontal member such as a beam or a base to be joined, and the end face of the horizontal member such as a beam / trunk is brought into contact with the side surface of the column. At the joint, it resists changes in angle between the two. Then, due to the deformation of the non-impregnated portion or the flexible portion, the strip-shaped fiber sheet attached at the portion adjacent to the region stretched between both wooden members is peeled off, or the impregnated synthetic resin is cracked to cause a weak point. It can be suppressed.

The invention according to claim 5 is the strip-shaped fiber attached so as to be stretched between the first wood member and the second wood member in the wood member joining structure according to claim 4. The sheet shall have a different amount of fibers per predetermined width depending on the position of the strip-shaped fiber sheet in the width direction.

In this wood member joining structure, it is possible to control the state when the portion stretched between the end face of the first wood member and the second wood member breaks. For example, by increasing the amount of fibers per predetermined width of the strip-shaped fiber sheet at a position away from the contact surface between the end surface of the first wooden member and the contact surface of the second wooden member, between both wooden members to be joined. The rigidity against changes in angle can be increased. Further, when a large angle change occurs due to an external force, the fibers at a position away from the contact surface between the end face of the first wood member and the contact surface of the second wood member tend to break or separate from the wood member first. It is possible to prevent the fibers from breaking or peeling at an early stage. On the other hand, the fiber sheet is broken by reducing the amount of fibers per predetermined width of the strip-shaped fiber sheet at a position away from the contact surface between the end surface of the first wooden member and the second wooden member. It is possible to control the bending rigidity between the wood members to be joined so as to gradually decrease.

The invention according to claim 6 is the wood member joining structure according to any one of claims 1 to 5, wherein the strip-shaped fiber sheet has the width of the surface of the first wood member or the second wood member. It is assumed that the strips have a smaller narrow width, and a plurality of narrow strip fiber sheets are arranged in the width direction and adhered to the first wooden member and the second wooden member.

In this wood member joining structure, since the strip-shaped fiber sheet is divided into a plurality of portions arranged in parallel in the width direction, the amount of fibers can be easily changed in the width direction. Further, in the non-impregnated portion or the flexible portion, each of the plurality of narrow strip-shaped fiber sheets behaves, and even if the tension difference of the fibers occurs in the width direction, the breakage of the strip-shaped fiber sheet in the fiber direction is suppressed. be able to.

The invention according to claim 7 includes a plurality of fibers that are continuous in the axial direction, and has a strip-shaped fiber sheet that is attached over the surfaces of a first wooden member and a second wooden member to be joined, and the strip-shaped fiber sheet. Has a resin-impregnated portion impregnated with a synthetic resin and adhered to the first wood member or the second wood member, and a non-impregnated portion in which the fibers are deformably exposed. The impregnated portion provides a joint portion reinforcing material provided between a portion of the resin impregnated portion that is adhered to the first wooden member and a portion that is adhered to the second wooden member. ..

In the joint portion reinforcing material of the present invention, the joint portion of the wood member is reinforced and the non-impregnated portion can be deformed by attaching the joint portion to both the first wood member and the second wood member to be joined. It is possible to prevent peeling of the strip-shaped fiber sheet attached to the strip-shaped fiber sheet and weak points in the strip-shaped fiber sheet. Since the strip-shaped fiber sheet is pre-impregnated with synthetic resin with the portion to be attached to the wooden member as a resin impregnated portion, it can be easily attached to the joint portion of the wooden member with a simple operation. In addition, the resin-impregnated portion and the non-impregnated portion can be accurately separated and formed.

The invention according to claim 8 includes a plurality of fibers that are continuous in the axial direction, and has a strip-shaped fiber sheet that is attached over the surfaces of a first wooden member and a second wooden member to be joined, and the strip-shaped fiber sheet. Is a resin impregnated portion impregnated with the first synthetic resin and adhered to the first wooden member or the second wooden member, and a second synthetic resin having a smaller elastic coefficient than the first synthetic resin. It has a flexible portion impregnated or coated with a second synthetic resin having a smaller elastic coefficient than the first synthetic resin, and the flexible portion adheres to the first wooden member of the resin impregnated portion. Provided is a joint reinforcing material provided between a portion to be formed and a portion to be adhered to the second wooden member.

In this joint reinforcing material, similarly to the joint reinforcing material according to claim 7, the joint of the wood members is reinforced by attaching the joint reinforcing material over both the first wood member and the second wood member to be joined. At the same time, it is possible to prevent the strip-shaped fiber sheet attached from being peeled off or the strip-shaped fiber sheet from being weakened due to the flexible deformation of the flexible portion. Then, it can be easily attached to the joint portion of the wooden member by a simple operation, and the resin impregnated portion and the flexible portion are accurately separated before being attached to the wooden member, and the synthetic resin is easily impregnated. Work or work of coating the fiber with synthetic resin can be performed.

The invention according to claim 9 is the joint reinforcing material according to claim 7 or 8, wherein the first wood member hits the end surface of the first wood against the surface of the second wood member. The strip-shaped fiber sheets are joined in contact with each other, and the strip-shaped fiber sheets are bonded by directing the fibers in the axial direction of the first wooden member, and the axial lines of the first wooden member and the second wooden member. A plurality of the strip-shaped fiber sheets having different directions of the fibers are superposed and bonded to each other by a synthetic resin impregnated in the resin impregnated portion. Shall be.

In this joint reinforcing material, since a plurality of strip-shaped fiber sheets having different fiber directions are bonded together, the plurality of strip-shaped fiber sheets can be efficiently bonded to the joint portion of the wood member. Further, even in the portion where a plurality of strip-shaped fiber sheets are overlapped, the resin-impregnated portion and the non-impregnated portion or the flexible portion can be accurately separated and formed.

As described above, in the wood member joining structure of the present invention, the joint portion of the wood member is effectively reinforced, and weak points are generated due to peeling of the attached strip-shaped fiber sheet and cracking of the synthetic resin impregnated in the strip-shaped fiber sheet. Can be suppressed. Further, in the joint portion reinforcing member of the present invention, it can be easily attached to both of the wood members to be joined, and the joint portion of the wood member is reinforced, the attached strip-shaped fiber sheet is peeled off, and the strip-shaped fiber is formed. It is possible to suppress the occurrence of weak points in the sheet.

It is a schematic perspective view of the wood member joint structure which is one Embodiment of this invention. It is a front view of the joint part reinforcing material used in the wood member joint structure shown in FIG. FIG. 5 is a schematic side view showing deformation of a strip-shaped fiber sheet when a relative displacement occurs between the wood members to be joined in the wood member joining structure shown in FIG. 1. FIG. 5 is a schematic perspective view showing deformation of a strip-shaped fiber sheet stretched between wood members when a relative displacement occurs between the wood members to be joined in the wood member joining structure shown in FIG. 1. It is a schematic perspective view of the wood member joint structure which is another embodiment of this invention. It is a schematic perspective view of the wood member joint structure which is another embodiment of this invention. It is a schematic perspective view of the wood member joint structure which is another embodiment of this invention. It is a schematic perspective view of the wood member joint structure which is another embodiment of this invention. It is a schematic perspective view of the wood member joint structure which is another embodiment of this invention. It is a schematic perspective view of the wood member joint structure which is another embodiment of this invention. It is a schematic perspective view of the wood member joint structure which is another embodiment of this invention. It is a schematic perspective view of the wood member joint structure which is another embodiment of this invention. It is a schematic perspective view of the wood member joint structure which is another embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic perspective view showing a wood member joint structure according to an embodiment of the present invention.
In this wooden member joint structure, a joint portion in which a wooden pillar 3 is erected on a base 2 which is a wooden member supported on a concrete foundation 1 is reinforced by a strip-shaped fiber sheet.
The foundation 2 is fixed to the foundation 1 at one end by anchor bolts or the like (not shown) embedded in the concrete of the foundation 1. Then, when a horizontal force such as an earthquake acts on the pillar 3 erected on the base 2, a force in the direction of pulling out from the base 2 and a force in the direction of causing an angle change with the base 2. Works. The strip-shaped fiber sheets 11, 12, and 13 are attached over the pillar 3 and the base 2 so as to resist these forces.

The strip-shaped fiber sheets 11, 12, and 13 are woven by arranging aramid fibers in the axial direction of the strip-shaped fiber sheet and using weft threads. Aramid fiber may be used for the weft, or other fiber may be used. The amount of aramid fibers can be appropriately increased or decreased depending on the strength required for the strip-shaped fiber sheet.
In the present embodiment, aramid fiber is used as the fiber, but carbon fiber, glass fiber, mineral fiber and the like can also be used. The same applies to the embodiments described below.

The strip-shaped fiber sheet includes a strip-shaped fiber sheet 11 vertically attached from the pillar 3 to the base 2 along the axial direction of the pillar 3, and the pillar 32 and the like so as to form an angle of approximately 45 ° with the pillar 3 and the base 2. It includes strip-shaped fiber sheets 12 and 13 attached so as to bridge over the base 2. The strip-shaped fiber sheet 11 attached in the vertical direction mainly resists the force in the direction of pulling out the pillar 3 from the base 2, and the strip-shaped fiber sheets 12 and 13 attached at an inclination mainly have the pillar 3 attached. It resists tilting. These are pasted on top of each other.
The inclination angles of the strip-shaped fiber sheets 12 and 13 to be attached at an inclination are not limited to 45 ° and can be set as appropriate.

These strip-shaped fiber sheets 11, 12, and 13 are portions to be attached to a pillar or a base, and have a resin impregnated portion 14 in which epoxy resin is impregnated between the fibers and a large number of fibers are bonded so as to be integrated. , It has a non-impregnated portion 15 in which the epoxy resin is not impregnated between the fibers and is not adhered to the pillar and the base.
The resin impregnated portion 14 includes both ends of the strip-shaped fiber sheets 11, 12, and 13 having a predetermined length, and is attached to the surfaces of the wooden pillar 3 and the base 2 by epoxy resin.
The synthetic resin impregnated in the band-shaped fiber sheets 11, 12 and 13 and the adhesive for adhering the band-shaped fiber sheet to the base 2 or the pillar 3 are not limited to the epoxy resin, and other synthetic resins having high adhesive strength are not limited. Can also be used. The same applies to all the embodiments described below.

The non-impregnated portion 15 is provided between a portion adhered to the pillar 3 of the resin impregnated portion and a portion adhered to the base 2 of the resin impregnated portion. That is, in the strip-shaped fiber sheet 11 attached in the vertical direction, the portion 11a attached to the pillar 3 and the portion 11b attached to the base are resin impregnated parts, and the pillar 3 and the base 2 come into contact with each other. The non-impregnated portion 15 is a predetermined range on both sides of the surface 4, for example, a range 11c about 15 mm above and below the position of the contact surface 4. In this region, the epoxy resin is not impregnated between the fibers and is not adhered to the column 3 and the base 2. Further, the strip-shaped fiber sheets 12 and 13 that are inclined and attached from the pillar 3 to the base 2 are attached so that a part in the width direction exceeds the position of the contact surface 4 between the pillar 3 and the base 2. , A part of 12d and 13d is stretched between the pillar 3 and the base 2 which are joined so as to be substantially at right angles, and both end sides 12a, 12b, 13a and 13b are attached to the pillar 3 and the base 2. ing. Between the resin impregnated portions 12a and 13a adhered to the pillars 3 of the strip-shaped fiber sheets 12 and 13 and the resin impregnated portions 12b and 13b adhered to the base 2, that is, the contact surface 4 between the pillars 3 and the base 2 is formed. The non-impregnated portions 15 are the predetermined ranges 12c and 13c on both sides of the straddle, and the substantially triangular regions 12d and 13d stretched between the pillar and the base.
The fibers woven without being impregnated with the epoxy resin are exposed in these non-impregnated portions 15, and the strip-shaped fiber sheets 11, 12 and 13 can be flexibly deformed apart from the pillar 3 and the base 2. There is.

The strip-shaped fiber sheet 11 attached vertically from the pillar 3 to the base 2 and the strip-shaped fiber sheets 12 and 13 attached diagonally are attached to the side surfaces of the pillar 3 and the base 2 to be joined as shown in FIG. Along with being attached, it is also attached to the back side of the pillar 3 and the base 2.

The strip-shaped fiber sheets 11, 12, and 13 can be attached to the pillar 3 and the base 2 as follows.
Epoxy resin is applied and impregnated with the strip-shaped fiber sheets 11 to be stuck in the vertical direction and the strip-shaped fiber sheets 12 and 13 to be stuck in the diagonal direction to the pillars 3 in a separated state. Then, it is pressed against the base 2 and the side surface of the pillar 3 standing on the base 2 and adhered to the pillar 3 and the base 2 with the impregnated epoxy resin. At this time, the fibers are left in an exposed state without being applied to the region to be the non-impregnated portion 15. In this way, the strip-shaped fiber sheets 11, 12, and 13 can be sequentially attached so as to partially overlap each other. Further, it is desirable to mask the portion to be the non-impregnated portion 15 in advance so that the epoxy resin is not impregnated. As masking, for example, the strip-shaped fiber sheets 11, 12 and 13 can be covered with a clay-like plastic body. Then, after impregnating with the epoxy resin and attaching it to the pillar 3 and the base 2, the plastic body can be removed or washed away.

On the other hand, the strip-shaped fiber sheet is pre-impregnated with an epoxy resin in a predetermined area at a factory or the like to serve as a joint reinforcing material in which a resin-impregnated portion and a non-impregnated portion are formed, and this is attached to the joint portion of a wooden member. You can also.
FIG. 2 is a front view showing a joint reinforcing member 10 manufactured in advance.
As shown in FIG. 1, the joint reinforcing material is attached to the strip-shaped fiber sheet 11 extending vertically from the pillar to the base, and the strip-shaped fiber sheets 12 and 13 attached so as to be approximately 45 ° with the pillar 3 and the base 2. Each of them is impregnated with epoxy resin, and these are laminated and integrated. The region 10a to be attached to the pillar 3 and the region 10b to be attached to the base 2 are resin impregnated portions 14 impregnated with epoxy resin, and when they are attached to the pillar 3 and the base 2, the pillar 3 is attached. A predetermined region 10c above and below the contact position between the lower end surface of the base 2 and the upper surface of the base 2 and a substantially triangular region 10d stretched between the pillar 3 and the base 2 are non-impregnated portions not impregnated with epoxy resin. It is 15. For the formation of the non-impregnated portion 15, a means such as masking can be used in the same manner as in the case where the strip-shaped fiber sheets 11, 12, and 13 are attached to the pillar 3 and the base 2 one by one.
By using the joint portion reinforcing material 10 manufactured in advance in this way, it is possible to efficiently perform the work of attaching the strip-shaped fiber sheet to the joint portion of the wooden member to reinforce it.

As described above, the joint portion of the wooden member reinforced by pasting the strip-shaped fiber sheets 11, 12, 13 behaves as follows when a large horizontal force is applied due to an earthquake or the like.
FIG. 3 is a schematic view showing a state in which the pillar 3 is tilted in a direction perpendicular to the surface to which the strip-shaped fiber sheets 11 and 11'are attached due to a horizontal force. In the event of an earthquake, a horizontal force that reverses the repeating direction acts, and a tensile force acts on one of the strip-shaped fiber sheets 11'attached to both sides of the pillar 3 and the base 2, causing elongation. Then, the other strip-shaped fiber sheet 11 is deformed in the shrinking direction. At this time, the predetermined range 11c extending above and below the contact surface 4 between the pillar 3 and the base 2 is a non-impregnated portion, and as shown in FIG. 3, the strip-shaped fiber sheet 11 is flexibly deformed and the strip-shaped fiber sheet 11 Excessive stress is avoided in the portions 11a and 11b adhered to the pillar 3 or the base 2 and the impregnated epoxy resin. That is, when the epoxy resin is continuously impregnated from the portion attached to the pillar 3 to the portion attached to the base, a force in the direction of peeling the strip-shaped fiber sheet acts due to the rigidity of the cured epoxy resin. Or, the cured epoxy resin may crack, but such a situation is avoided.

On the other hand, FIG. 4 is a schematic perspective view showing a state when a horizontal force acts in a direction along the surface to which the strip-shaped fiber sheets 11, 12, and 13 are attached. As shown in this figure, when the pillar 3 is tilted and the angle between the pillar 3 and the base 2 changes, one of the strip-shaped fiber sheets 12 stretched diagonally downward on both sides from the pillar 3 and attached to the base is attached. A tensile force acts, and the other 13 is loosened as shown by the alternate long and short dash line in FIG. The stretched parts 12d and 13d of the strip-shaped fiber sheet are non-impregnated parts that are not impregnated with epoxy resin, and are flexibly deformed when loosening occurs, and the angle between the pillar 3 and the base 2 changes. Follow. Therefore, a force in the direction of peeling acts on the strip-shaped fiber sheets 12 and 13 on both sides of the stretched portions 12d and 13d, and the epoxy resin impregnated in the strip-shaped fiber sheets 12 and 13 is cracked. Can be avoided. Further, in the strip-shaped fiber sheet 11 attached in the vertical direction from the pillar 3 to the base 2, a tensile force acts on one edge due to the inclination of the pillar 3, and loosening occurs at the other edge, but the pillar 3 Since the upper and lower sides of the contact surface 4 with the base 2 are non-impregnated portions 15, the non-impregnated portion 15 follows the inclination of the pillar 3 and the strip-shaped fiber sheet 11 is prevented from peeling off and the epoxy resin is prevented from cracking.

The wood member joining structure and the joining portion reinforcing material 10 shown in FIGS. 1 to 4 have the portions 11a, 12a, 13a attached to the pillar which is the resin impregnated portion of the strip-shaped fiber sheet and the portions 11b attached to the base 2. Although it has a non-impregnated portion 15 that is not impregnated with an epoxy resin between 12b and 13b, instead of the non-impregnated portion 15, a synthetic resin having a smaller elastic coefficient than the resin impregnated in the resin impregnated portion is used. It may be a flexible portion impregnated between fibers in the same region. Further, the flexible portion may be a strip-shaped fiber sheet coated with a synthetic resin so as to cover the fibers in the same region.
The synthetic resin impregnated or coated on the flexible portion preferably has a small elastic modulus, and for example, a silicone resin can be used.
Due to the impregnation or coating of the synthetic resin having a small elastic modulus in this way, the flexible portion is flexibly deformed when a relative displacement occurs between the column 3 and the base 2, and the flexible portion is flexibly deformed in the same manner as the non-impregnated portion 15. It is possible to avoid peeling of the fiber sheet and cracking of the strip-shaped fiber sheet. Further, by coating with a soft synthetic resin, damage to the fibers due to contact with other members can be suppressed.

FIG. 5 is a schematic perspective view showing a wood member joint structure according to another embodiment of the present invention.
In this joint structure, the strip-shaped fiber sheet 21 is attached only in the vertical direction along the axis of the pillar 3. The strip-shaped fiber sheet 21 mainly reinforces the pulling out of the pillar 3, and the region 21a attached to the pillar 3 and the region 21b attached to the base 2 are resin-impregnated portions, and the pillar 3 is used. The regions 21c extending on both the upper and lower sides of the contact surface 4 between the lower end surface of the base 2 and the upper surface of the base 2 are non-impregnated portions or flexible portions.

FIG. 6 shows a joint portion in which another base 5 is joined to the base 2 in the direction perpendicular to the base 2 at the position where the pillar 3 is erected, and is reinforced by attaching strip-shaped fiber sheets 31 and 32. In this joining structure, the strip-shaped fiber sheet cannot be attached vertically along the axis of the pillar 3 to the side surface of the pillar 3 and the base 2 on the side where the other base 5 is joined, and the strip-shaped fiber sheet cannot be attached in the inclined direction. Only the strip-shaped fiber sheets 31 and 32 are attached. Even in such a joint structure, the portions 31d and 32d stretched between the pillar 3 and the base 2 of the strip-shaped fiber sheets 31 and 32 attached at an angle are used as non-impregnated portions or flexible portions. Therefore, peeling and cracking of the strip-shaped fiber sheets 31 and 32 can be avoided.

In the wood member joining structure shown in FIG. 7, the strip-shaped fiber sheet 41 is attached vertically along the axis of the pillar 3 and the strip-shaped fiber sheet 42 is obliquely attached from the pillar 3 to the base 2 in the same manner as the structure shown in FIG. , 43 are pasted. However, in this structure, the strip-shaped fiber sheets 42 and 43 attached in the diagonal direction are not stretched between the pillar 3 and the base 2, but are in contact with the lower end surface of the pillar 3 and the upper surface of the base 2. It is attached within the range of the side surfaces of the pillar 3 and the base 2 beyond the contact surface 4. Then, the predetermined range 44 over the upper and lower sides of the position of the contact surface 4 between the pillar 3 and the base 2 is impregnated or coated with a non-impregnated portion where the fibers of the strip-shaped fiber sheets 42 and 43 are exposed or a flexible synthetic resin. It is a flexible part.

FIG. 8 shows a joint structure between the base 7 and the pillar 6 at the protruding corner of the building, and shows the bases 7a and 7b in which the two wooden members are butted in substantially right angles, and the corners of the base 7. The joint with the pillar 6 erected above is reinforced by attaching a strip-shaped fiber sheet.
In this joint structure, the strip-shaped fiber sheets 51 and 52 are attached vertically from the two outer side surfaces of the pillars at the protruding corners to the bases 7a and 7b, and are overlapped with the strip-shaped fiber sheets 51 and 52 in the vertical direction. The strip-shaped fiber sheets 53 and 54 are attached diagonally downward from the pillar 6 to the base 7. In the strip-shaped fiber sheets 53, 54 attached in the diagonal direction, the pillar 6 or the base 7 is formed between the portions 53a, 54a attached to the pillar 6 and the portions 53b, 54b attached to the base 7. There is a portion stretched away from the side surface, and the substantially triangular portions 53c and 54c are non-impregnated portions or flexible portions. Further, the portion 55 of the strip-shaped fiber sheets 51 and 52 attached in the vertical direction and the strip-shaped fiber sheets 53 and 54 attached in the diagonal direction straddling the contact surface between the pillar 6 and the base 7 is the contact surface. The predetermined range above and below the position is the non-impregnated part or the flexible part.

Similar to the structure shown in FIG. 1, the wood member joining structure shown in FIG. 9 has a strip-shaped fiber sheet 61 attached vertically along the pillar 3 at the joint portion between the pillar 3 and the base 2, and the pillar 3 to the base. The strip-shaped fiber sheets 62 and 63 are attached to No. 2 at an angle of about 45 °. The strip-shaped fiber sheets 62 and 63 attached at an inclination of approximately 45 ° are stretched between the pillar 3 and the base 2.
In this structure, the portions 62d and 63d stretched between the pillar 3 and the base 2 are impregnated with epoxy resin, and are not impregnated portions or flexible portions. A predetermined range 64 is a non-impregnated portion or a flexible portion on both the upper and lower sides of the position of the contact surface 4 between the lower end surface of the pillar 3 and the upper surface of the base 2.
In this joint structure, for example, the strip-shaped fiber sheets 62 and 63 attached at an angle have a small thickness, and the portions 62d and 63d stretched between the pillar 3 and the base 2 are impregnated with epoxy resin. It can be adopted when bending is possible. That is, as shown in FIG. 4, when an angle change occurs between the pillar 3 and the base 2, the epoxy resin can be deformed so as to be curved without cracking and can follow the tension. It is possible to avoid the occurrence of weak points due to cracking without making the formed portion a non-impregnated portion or a flexible portion.

Similar to the structure shown in FIG. 1, the wooden member joint structure shown in FIG. 10 also has a strip-shaped fiber sheet 71 attached vertically along the pillar 3 at the joint portion between the pillar 3 and the base 2, and the pillar 3 to the base. The strip-shaped fiber sheets 72 and 73 are attached at an angle of about 45 ° over 2. A part of the strip-shaped fiber sheets 72 and 73 attached at an inclination of approximately 45 ° is stretched between the pillar 3 and the base 2. In this joint structure, as shown in FIG. 10, a plurality of strip-shaped fiber sheets 72 and 73 attached at an angle are arranged in parallel with a width smaller than the width of the wooden member serving as the pillar 3 or the base 2. ing. Then, similarly to the joint structure shown in FIG. 1, a predetermined range 74 extending above and below the position corresponding to the contact surface 4 between the lower end surface of the pillar 3 and the upper surface of the base 2 and the tension between the pillar 3 and the base 2. The spanned region 75 is a non-impregnated portion or a flexible portion.

In this bonding structure, it is possible to easily change the amount of fibers per predetermined width for each narrow strip-shaped fiber sheet arranged in parallel in the diagonal direction. That is, the amount of fibers of the narrow strip-shaped fiber sheets 72a and 73a, which are located away from the contact surface 4 between the pillar 3 and the base 2 and have a large stretched length, is applied to the pillar 3 and the base 2. It can be made larger or smaller than the narrow strip-shaped fiber sheets 72b and 73b attached at a position close to the contact surface 4. For example, when the strip-shaped fiber sheets 72, 73 stretched with the pillar 3 greatly inclined are broken, the narrow strip-shaped fiber sheets 72a, 73a located at a position away from the contact surface 4 between the pillar 3 and the base 2. By setting the amount of fibers of the column 3 to be small and the column 3 and the base 2 to be sequentially broken from a position away from the contact surface 4, it is possible to control a decrease in the rigidity of the joint portion at the time of breaking. ..
Further, the amount of fibers of the narrow strip-shaped fiber sheets 72a and 73a located away from the contact surface between the pillar 3 and the base 2 is increased, and the rigidity of the joint portion between the pillar 3 and the base 2 with respect to an angle change is increased. Can also be set large.

All of the embodiments described above have been a joint structure of a pillar and a base, but the present invention can be applied to other parts of a wooden building.
The wooden member joint structure shown in FIG. 11 has a structure in which a beam 82 is supported on a pillar 81 on the lower floor and a joint portion in which a pillar 83 on the upper floor is erected on the beam 82 is reinforced by a strip-shaped fiber sheet. It shows.
In this joint structure, a strip-shaped fiber sheet 91 continuous from the side surface of the pillar 83 on the upper floor to the side surface of the pillar 81 on the lower floor via the side surface of the beam 82 is attached. Further, the strip-shaped fiber sheets 92 and 93 extending from the lower part of the pillar 83 on the upper floor to the side surface of the beam 82 diagonally downward on both the left and right sides, and the beam 82 diagonally upward on both the left and right sides from the upper part of the pillar 81 on the lower floor. The strip-shaped fiber sheets 94 and 95 extending to the side surface are attached. Then, in these strip-shaped fiber sheets, a predetermined range 97 above and below the position where the lower end surface of the pillar 83 on the upper floor and the upper surface of the beam 82 abut, and the lower surface of the beam 82 and the upper end surface of the pillar 81 on the lower floor are formed. A predetermined range 98 above and below the abutting position becomes a non-impregnated portion or a flexible portion, and is approximately stretched between the pillar 83 and the beam 82 on the upper floor and between the pillar 81 and the beam 82 on the lower floor. The triangular portion 99 is a non-impregnated portion or a flexible portion.

FIG. 12 shows a joint structure in which a joint portion formed by abutting an end surface of a beam 85 against a side surface of a pillar 84 and being joined is reinforced by using a strip-shaped fiber sheet.
In such a joint structure, a structure in which the shearing force of the beam 85 is transmitted by a beam receiving metal fitting, and a structure in which the shearing force is transmitted by processing and fitting the ends of the column and the beam are widely adopted. However, it is reinforced in place of these structures or by attaching strip-shaped fiber sheets 101, 102, 103 together with these structures.
In this joint structure, the strip-shaped fiber sheet 101 is attached to the side surface of the column 84 from the side surface of the beam 85 substantially horizontally along the axis of the beam 85, and is attached to the side surface of the column 84 diagonally upward from the side surface of the beam 85. A strip-shaped fiber sheet 102 and a strip-shaped fiber sheet 103 attached to the side surface of the pillar 84 obliquely downward from the side surface of the beam 85 are used, and these are laminated and attached. The strip-shaped fiber sheets 102 and 103 attached obliquely upward and diagonally downward from the side surface of the beam 85 are regions stretched between the beam 85 and the column 84 apart from the side surface of the beam 85 or the side surface of the column 84. 104 is provided. Predetermined ranges 105 on both sides of these strip-shaped fiber sheets 101, 102, 103 at positions corresponding to the contact surfaces 106 between the end surface of the beam 85 and the side surface of the column 84, and the tension between the beam 85 and the column 84. The formed region 104 is a non-impregnated portion or a flexible portion. In the case where the beam 85 is joined to the side surface of the column 84 as in the present embodiment, the strip-shaped fiber sheet 103 attached to the column 84 diagonally downward from the beam 85 can be omitted.

In the joint structure shown in FIG. 13, two horizontal members 86, 87 such as beams and trunk differences arranged on the same axis are connected so as to abut the end faces, and the joint portion is a strip-shaped fiber sheet. Is reinforced with.
The end of one 86 of the connecting horizontal members is processed so that the lower part protrudes, and the end of the other horizontal member 87 is processed so that the upper part protrudes. Then, the other horizontal member 86 is joined so as to rest on the end portion of the other horizontal member 86. A strip-shaped fiber sheet 111 is attached to these horizontal members 86 and 87 substantially horizontally along the side surface. Then, the region 112 of the attached strip-shaped fiber sheet 111 covers the position where the vertical end faces 88 of both horizontal members 86 and 87 face each other and the position of the horizontal plane 89 on which both are overlapped, is the strip-shaped fiber sheet. The 111 is a non-impregnated portion that is not impregnated with an epoxy resin or a flexible portion that is impregnated with a synthetic resin having a smaller elastic coefficient than the epoxy resin or is coated with the synthetic resin. When the non-impregnated portion or the flexible portion is not adhered to the horizontal members 86 and 87 and a relative displacement in the axial direction or an angle change between the two connected horizontal members occurs. In addition, the non-impregnated portion or the flexible portion is flexibly deformed to prevent cracking of the epoxy resin and peeling of the strip-shaped fiber sheet.

1: Foundation, 2: Foundation, 3: Pillar, 4: Contact surface between pillar and foundation, 5: Foundation, 6: Pillar, 7: Foundation,
10: Joint reinforcement, 11: Strip-shaped fiber sheet attached in the vertical direction, 11a: Resin impregnated part adhered to the pillar, 11b: Resin impregnated part adhered to the base, 11c: Contact between the pillar and the base Range on both sides straddling the contact surface, 12, 13: Strip-shaped fiber sheet attached at an angle, 12a, 13a: Resin impregnated part adhered to the pillar, 12b, 13b: Resin impregnated part adhered to the base, 12c , 13c: The range on both sides straddling the contact surface between the pillar and the base, 12d, 13d: The almost triangular area stretched between the pillar and the base, 14: Resin impregnated part, 15: Non-impregnated part ， ，
21: Strip-shaped fiber sheet, 21a: Area attached to the pillar, 21b: Area attached to the base, 21c: Area extending on both sides of the contact surface between the pillar and the base 2,
31, 32: Strip-shaped fiber sheet, 31d, 32d: Part stretched between the pillar and the base,
41: Strip-shaped fiber sheet attached in the vertical direction, 42, 43: Strip-shaped fiber sheet attached in the diagonal direction, 44: Predetermined range over the upper and lower sides of the position of the contact surface between the pillar and the base 2.
51, 52: Strip-shaped fiber sheet attached in the vertical direction, 53, 54: Strip-shaped fiber sheet attached in the diagonal direction, 53a, 54a: Part attached to the pillar of the strip-shaped fiber sheet, 53b, 54b: The part attached to the base of the strip fiber sheet, 53c, 54c: the almost triangular part where the strip fiber sheet is stretched, 55: the part straddling the contact surface between the pillar and the base of the strip fiber sheet,
61: Strip-shaped fiber sheet stuck in the vertical direction, 62, 63: Strip-shaped fiber sheet stuck in the diagonal direction, 62d, 63d: The part stretched between the pillar and the base,
71: Strip-shaped fiber sheet pasted in the vertical direction, 72, 73: Strip-shaped fiber sheet pasted in the diagonal direction, 72a, 73a: Narrow strip-shaped fiber sheet with a large stretched length, 72b, 73b : Narrow strip-shaped fiber sheet attached near the contact surface between the pillar and the base, 74: A predetermined range above and below the position of the contact surface between the pillar and the base 2, 75: The pillar and the base Area stretched between,
81: Columns on the lower floors, 82: Beams, 83: Columns on the upper floors, 84: Columns, 85: Beams, 86, 87: Horizontal members, 88: Vertical end faces of horizontal members, 89: Horizontal members Horizontal plane with the edges of the
91: Strip-shaped fiber sheet pasted in the vertical direction, 92, 93, 94, 95: Strip-shaped fiber sheet pasted in the diagonal direction, 97: Position of the strip-shaped fiber sheet where the columns and beams of the upper floors come into contact with each other. Predetermined range above and below, 98: Predetermined range above and below the position where the column and beam on the lower floor of the strip fiber sheet abut, 99: Almost triangular part stretched between the column and beam,
101: Horizontally attached strip-shaped fiber sheet, 102, 103: Obliquely pasted strip-shaped fiber sheet, 104: Area stretched between columns and beams, 105: Between columns and beams Predetermined range on both sides of the position of the contact surface, 106: Contact surface between the end face of the beam and the side surface of the column,
: An almost triangular part stretched between columns and beams,
111: Strip-shaped fiber sheet, 112: Area covering the position of the vertical end face of the connecting horizontal member and the position of the horizontal plane on which both are overlapped.

Claims (9)

It is a wood member joining structure in which the end face of the first wood member is abutted against the second wood member and joined.
A strip-shaped fiber sheet containing multiple fibers that are continuous in the axial direction is attached over the surfaces of both wood members to be joined.
The strip-shaped fiber sheet includes a resin-impregnated portion impregnated with a synthetic resin and adhered to the first wood member or the second wood member, and the first wood member and the first wood member in which the fiber is deformably exposed. It has a non-impregnated portion that is not adhered to the second wooden member.
A wood member joint characterized in that the non-impregnated portion is provided between a portion of the resin impregnated portion bonded to the first wood member and a portion bonded to the second wood member. Construction. It is a wood member joining structure in which the end face of the first wood member is abutted against the second wood member and joined.
A strip-shaped fiber sheet containing multiple fibers that are continuous in the axial direction is attached over the surfaces of both wood members to be joined.
The strip-shaped fiber sheet is composed of a resin-impregnated portion impregnated with a synthetic resin and adhered to the first wooden member or the second wooden member, and a composite having a smaller elastic modulus than the synthetic resin impregnated in the resin impregnated portion. A flexible portion that is impregnated with resin or is coated with a synthetic resin having a smaller elastic modulus than the synthetic resin impregnated in the resin impregnated portion and is not adhered to the first wooden member and the second wooden member. And have
A wood member joint characterized in that the flexible portion is provided between a portion of the resin impregnated portion bonded to the first wood member and a portion bonded to the second wood member. Construction. Claim 1 is characterized in that the non-impregnated portion or the flexible portion is provided on both sides of the position of the contact surface where the end surface of the first wooden member is abutted against the second wooden member. Alternatively, the wood member joining structure according to claim 2. The end face of the first wood member is abutted against and joined to the surface of the second wood member having an axis in a direction substantially perpendicular to the axis of the first wood member.
The strip-shaped fiber sheet includes those having axes in the axial direction and the inclined direction of the first wooden member and the second wooden member.
In the strip-shaped fiber sheet, the first wooden member and the second wooden member are formed between a portion of the resin impregnated portion bonded to the first wooden member and a portion bonded to the second wooden member. It has a part that is stretched away from the wood member,
The wood member joining structure according to claim 1 or 2, wherein the stretched portion is the non-impregnated portion or the flexible portion. The strip-shaped fiber sheet attached so as to be stretched between the first wood member and the second wood member has a fiber amount per predetermined width depending on the position of the strip-shaped fiber sheet in the width direction. The wood member joining structure according to claim 4, wherein the wood members are different from each other. The strip-shaped fiber sheet has a narrow strip shape smaller than the width of the surface of the first wooden member or the second wooden member, and a plurality of narrow strip-shaped fiber sheets are arranged in the width direction to form the first strip-shaped fiber sheet. The wood member joining structure according to any one of claims 1 to 5, wherein the wood member is adhered to the wood member and the second wood member. It contains a plurality of fibers that are continuous in the axial direction, and has a strip-shaped fiber sheet that is attached over the surfaces of a first wooden member and a second wooden member to be joined.
The strip-shaped fiber sheet has a resin-impregnated portion that is impregnated with a synthetic resin and adhered to the first wooden member or the second wooden member, and a non-impregnated portion in which the fibers are deformably exposed. And
The joint portion reinforcement characterized in that the non-impregnated portion is provided between the portion of the resin impregnated portion that is adhered to the first wooden member and the portion that is adhered to the second wooden member. Material. It contains a plurality of fibers that are continuous in the axial direction, and has a strip-shaped fiber sheet that is attached over the surfaces of a first wooden member and a second wooden member to be joined.
The strip-shaped fiber sheet has a resin-impregnated portion impregnated with the first synthetic resin and adhered to the first wooden member or the second wooden member, and a second having a smaller elastic modulus than the first synthetic resin. It has a flexible portion impregnated with the synthetic resin of the above or coated with a second synthetic resin having a smaller elastic modulus than the first synthetic resin.
A joint portion reinforcement characterized in that the flexible portion is provided between a portion of the resin impregnated portion that is adhered to the first wooden member and a portion of the resin impregnated portion that is adhered to the second wooden member. Material. The first wood member is joined by abutting the end face of the first wood against the surface of the second wood member.
The strip-shaped fiber sheet is bonded by directing the fibers in the axial direction of the first wooden member, and directs the fibers in a direction inclined with the axial directions of the first wooden member and the second wooden member. Including those that are glued together
The joint reinforcement according to claim 7 or 8, wherein a plurality of the strip-shaped fiber sheets having different fiber directions are superposed and adhered to each other by a synthetic resin impregnated in the resin impregnated portion. Material.

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